Adding CI

.travis.yml

+osx_image: xcode7.1
+language: objective-c
+env:
+  global:
+  - LC_CTYPE=en_US.UTF-8
+  - LANG=en_US.UTF-8
+before_install:
+  - brew update || brew update
+  - brew outdated xctool || brew upgrade xctool
+  - gem install cocoapods
+  - xcrun simctl list
+install: echo "<3"
+env:
+  - MODE=build
+  - MODE=examples
+script: ./build.sh $MODE
+
+# whitelist
+branches:
+  only:
+    - master

build.sh

+#!/bin/bash
+
+# **** Update me when new Xcode versions are released! ****
+PLATFORM="platform=iOS Simulator,OS=9.1,name=iPhone 6s"
+SDK="iphonesimulator9.1"
+
+
+# It is pitch black.
+set -e
+function trap_handler() {
+    echo -e "\n\nOh no! You walked directly into the slavering fangs of a lurking grue!"
+    echo "**** You have died ****"
+    exit 255
+}
+trap trap_handler INT TERM EXIT
+
+
+MODE="$1"
+
+if [ "$MODE" = "build" ]; then
+    echo "Building Zip."
+    xctool \
+        -project Zip.xcodeproj \
+        -scheme Zip \
+        -sdk "$SDK" \
+        -destination "$PLATFORM" \
+        build
+    trap - EXIT
+    exit 0
+fi
+
+if [ "$MODE" = "examples" ]; then
+    echo "Building and testing all Zip examples."
+
+    for example in examples/*/; do
+        echo "Building $example."
+        pod install --project-directory=$example
+        xctool \
+            -workspace "${example}Sample.xcworkspace" \
+            -scheme Sample \
+            -sdk "$SDK" \
+            -destination "$PLATFORM" \
+            build test
+    done
+    trap - EXIT
+    exit 0
+fi
+
+echo "Unrecognised mode '$MODE'."